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INTEROPERABILITY ENABLES COMMUNICATION AND INTELLIGENT INTERACTION BETWEEN SYSTEMS OF DISSIMILAR NETWORK ARCHITECTURES AND PROTOCOLS, USING EQUIPMENT MADE BY DIFFERENT VENDORS AND OWNED BY DIFFERENT SERVICE PROVIDERS. INTEROPERABILITY

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Reliable Multicasting Over Satellite Applications l Software distribution & updates l Product inventory l Kiosk multimedia programming l Internet web caching l Data warehousing l Multicast technology enables data to be simultaneously transmitted to many network users, but not necessarily all sites on a network l Permits a network node to transmit one message to one or more nodes in a single operation Benefits l Can provide huge savings in bandwidth by transmitting only a single copy of data (subset of broadcasting) Impact l A large retail chain store uses satellite multicast to distribute software updates r Multicasting a 1 Mbyte file to 250 clients now takes 4 minutes r Unicast originally took over 6 hours l Relieve terrestrial bandwidth bottlenecks Land Line Network Uplink Site Uplink Downlinks

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Conclusions IP Over Satellites Today Works !!!! IP over satellites not the issue anymore !! –Delay over Sat Link not a problem What Data services the Customer Wants ? What new services and applications will futures satellite constellations provide ?